Any idea how he perceives you?

Giving him a fairly wide range {AA,JJ,66,AJs+,AdTd,KdQd,ATo+} we have 47% equity on the flop, however his range for betting the turn that big seems to me like it wouldn't have that many diamonds in it since he would mind you drawing as much.

So removing all the diamond combos, all ATo and half AQo/AKo leaves us with 15% equity. Adding in all the AK/AQ combos gives us 37%.

Against {AA,JJ,AJs+,AKo+} no diamonds we have 42% - so I think important points are does he have 66 in his range + does he do this with AT? Need to also plan the river as well + include UTG's range.