Defending BB with small pair

[Professor Frink]

Do you think he'd call down the check raise without hand? What hands would you push him off if he had you beat?

I'd probably go for a call/call/bet, if he's the bet/bet/check after a raise type. On the turn there's 3.25BB after his bet, if you raise it's giving him 5.25 to 1 (and at least 6.25 including your river bet/call if he hits), which it not quite enough to draw to two overcards but given that he's looking at a pocket pair a good percentage of time (not sure how much), or could sometimes have other outs, i don't like the checkraise as it seems pretty thin.

I haven't really had this come up so i'm not sure. What's the thought behind this?