CO 23/27/3b 11, 20 hands

BTN 75/40, 4 hands

I wasn't sure if calling here is my best option or if I should turn this into a 4b bluff or even fold. I'd have done so with KQo. AJo or TT are also hands I wouldn't be sure about.

Hand ends here and makes it kinda boring. I'm thinking about my river play though. I can't really put him on a hand he'd c/c here with since I expect him to bet all of his overpairs on the flop as well as his likely big flushdraws so I expect him to give up very frequently in that spot. But I guess facing a c/c I'd follow through on most cards like hearts, straightening cards and maybe also a J since I'd put him on a weak 1p then.
What do you think about that?