Understanding Blind Defense - when to let it go

[junkmail3]

Here is a hand from last night:

3/6 folded to CO who raises to $6.

I'm in the BB with KdQd. I KNOW he's on a steal.

Hero reraises to $9. CO caps.

Flop comes: 9s 4h 7h

Hero ???

(And please advise what you would do if he bet/raised after your action)