The crew of the Part 121 scheduled passenger flight reported that the landing approach at the destination was stable. The first officer, who was the pilot flying, stated that the airplane was slightly high and fast when he began the landing flare and he pushed the nose down to correct. He then determined that he had overcorrected and began to recover by pulling the control column aft when the airplane landed firmly on the main landing gear and the aft fuselage impacted the runway. Postflight inspection revealed an area of abrasion damage to the aft fuselage and the underlying stringers and frames and damage to the aft pressure bulkhead.