$25-$50 NL KJo in the bb

[Paluka]

I don't normally play this sort of game but I'm pretty sure there are 2 guys in it who do not know how to play poker so I'm taking a shot.
5 handed, I'm in the bb. Folded to the sb who makes it $150. He has been raising quite a bit preflop, and has raised 4 times in a row or so when it was folded to him in the sb. I have $7000 he has me covered. I've been folding to his raises, and we haven't really been involved in a hand. He has shown a willingness to fold to smallish preflop re-raises, but he has also called some sizeable all-in re-raises from short stacks with hands like 88 and A2s.
Anyway, he makes it $150 I re-raise to $500 with KJo. He calls. Flop comes J75 rainbow. He checks, I bet $750 he calls. Turn A putting 2 hearts on board. He checks. My play?