A B737 crew was notified after takeoff about 759 LBS of cargo loaded in the aircraft's forward bin but not included on the weight and balance. The weight and balance was corrected and the flight continued normally to its destination.

Narrative

During our climb out on an originator; we were contacted by ATC and told that the departure station Operations wished to speak with us. As I was the pilot not flying; I called back to Operations. I was advised that there was an omission of 759 LBS of cargo from the loading schedule that we had received. The cargo had been loaded in the forward bin. I was then given a corrected zero fuel weight and takeoff weight. I advised the First Office of the error. We discussed any adverse ramifications. Due to the light load onboard; we determined that the additional weight would not affect any flight planned characteristics (climb; cruise; etc.). The correct weights were entered into the FMC and the performance computer. We continued the flight without any further complications. I had noticed in the past few days that there were numerous delays reported on Dispatch Releases attributed to incorrect or late bin slips from the Ramp. I had discussed these with the Agents in those cities. It was explained to me that there was a change in procedures and it was causing delays. Apparently these errors were caught early in the process. We were fortunate that the error was small. Nevertheless; in the future; I can only relate my experience with Coworkers to help ensure this does not happen again.