You block AK, AA, KK all of which are expected to 3b anyways pre. Having said that, there remains 1 combo of AA, 1 combo of KK, 3 combos of 77. While he’s repping an extremely narrow range, part of that is made up of worse 2 pairs. The only other hands he may ever show up with are some suited pairs with backdoor combo draws, while his range is extremely narrow, folding to this stack depth is disastrous. If your question is between flatting or jamming, I live jamming the flop. If he shows up with some BDFD + pair/SD combos you’re going to want to deny equity even though he’s essentially committed at this point. Unlucky result I guess he ends up showing up with one of the few combos that have you beat, even then you still have some equity against. Cooler.