A B737 FLT CREW MISTOOK A COMPANY CALL FOR GND CTL AND CROSSED THE RWY WITHOUT A CLRNC; RESULTING IN AN ACFT GOING AROUND.

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LANDED ABQ RWY 3; TURNED OFF TXWY C; CONTACTED GND AND WAS CLRED TO HOLD SHORT OF RWY 8. READ BACK CLRNC. DID FLAPS UP; CLEAN UP CHKLIST. RPTED OFF TO CALL OPS TO VERIFY GATE. DID NOT HEAR COMPANY AFTER FIRST CALL. TURNED #2 VOLUME UP AND CALLED AGAIN AND VERIFIED GATE. AS WE SLOWED TO HOLD SHORT OF RWY 8; I CAME BACK ON #1 VOLUME AND BELIEVED I HEARD A CLRNC FOR US TO PROCEED WITHOUT DELAY AND CROSS RWY 8. I READ BACK THE CLRNC AND WE CLRED L AND R AND CROSSED RWY 8. THE ONLY ACFT IN SIGHT ON FINAL LOOKED TO BE A SAFE DISTANCE OUT. AS WE CLRED THE RWY; GND TOLD US WE WERE SUPPOSED TO HOLD SHORT OF RWY 8. I TOLD THEM WE READ BACK A CLRNC TO CROSS WITHOUT DELAY. GND CTL TOLD US THE XING WAS FOR A GND VEHICLE. FACTORS: I WAS MONITORING BOTH COMPANY AND GND WITH THE VOLUME ON COMPANY UP. I MAY HAVE HEARD THE COMPANY USE OUR CALL SIGN AS THE CLRNC WAS GIVEN AND MISTOOK IT FOR OUR CLRNC. I DID READ BACK THE CLRNC AND WAS NOT CORRECTED BY GND. THERE WAS PLENTY OF ROOM TO STOP HAD GND RESPONDED TO MY READBACK. WE WERE THE ONLY ACFT HOLDING SHORT OF RWY 8. CORRECTIVE ACTION: BE CAREFUL WITH VOLUME CTL. LISTEN CLOSER TO #1 VOLUME AND MAYBE MISS A CALL OR TWO ON COMPANY SUPPLEMENTAL INFO FROM ACN 584869: TWR SENT THE ACFT ON FINAL AROUND.