my guess is that he has one of two hands.
[6h]. he's telling you this because he doesn't want to call that much more, but given the pot he knows he'll be forced to. I don't know why he didn't lead out though. maybe he thought the CR would look bigger than the bet/push move.
or
5x (probably A5s or 65s), and is telling you this to make his hand look weaker. you're playing the hand like you have either a big hair or the NFD, most likely the overpair though.
In the later case, you're a huge dog. in the first case you're a small favorite. I'm folding here. the range of hands you're behind to combined with the range of hands you're ahead of but have to dodge a million outs against just has to make this push -EV. I'm all about taking advantage of marginal situations, but this just seems too clearly a poor spot.