10-25 Pot Limit Holdem Hand

[Riverman]

Fired up pot limit holdem game in the aftermath of the WPT. We have one WSOP bracelet who is trying to bully the table with an obcenely large stack (10-15k). He was not involved in this hand but he had loosened up the table considerably. 4 limpers to me, I call in the cutoff with 77. SB folds and BB raises to 100. He likes to build pots with a wide range of hands. $500 in the pot for a 10 7 6 flop with 2 hearts. All check to me. How much should I bet and why?