lets go with him preventing the steal with the 3bet. now i'd put him on a ATs+, QQ+, Kx, and possibly Qx depending on plays he'd made in the past. With his c-bet, I'm putting him then on a draw, weak pair, air, or bottom 2pr depending how he's played those in the past. the check confirms this as he wasn't confident.

His c-bet was a little less than 3/4ths, so I'd probably mix between calling and re-raising in this and similar situations with the same player. but again that depends on previous reads since we are also on a draw. if he had c/r you on turn, i'd fold