I would have probably raised the pot, but I am aggressive, and it wouldn't look out of the ordinary.

Then again, just calling would look like either a queen, or an 8, and given the results, he was likely behind to your calling range there.

I would have picked a raise size of about 4000, little more than twice his raise. He probably would have chased a queen anyways, and you could have fired another volley on the turn.

But as it stood, your line was fine, you got 8100 out of his 29K stack, which is more than 1/4th of it, you might have been able to bet more and get a call since he seems like he is a loose caller, but a bigger bet on the turn or river might chase him off.