Is it domestic travel? Generally Domestic is 2.75 - 3.25 hrs. before flight. So, for a 7:30 flight; you're looking at a ME pick-up time of somewhere around 4:30. You'll need to be at the stop at least 10 mins. prior, as those times are the times the buses are supposed to pull out of the resort, not necessarily get there. If you're needing to pick-up luggage; I'd say back it up another 20 mins. or so. At the very latest; I'd be at your resort at the luggage counter a half hour before your ME pick-up time.
International is 4 hrs. prior to flight.