Well you've doubled on a bad card to double so you're showing a ton of strength, it is also a board that hits your range pretty hard. Second if he is bluffing he has to risk a bunch of money for $180 when your not gonna be folding as often as you would in other spots.

I don't really know how you play though and the dynamic that you guys may have. I would have to guess though if this guy has a clue he's not gonna try to pull a move in a spot like this where you are going to be questioning his line when he thinks you're stationy/spewy. You'd have to be a bunch of levels deep for this to be a good bluff.

This is also probably the close to the bottom of your value range I would think so folding here can't be that bad.