Hi there, I am having a lot of difficulty figuring out how to obtain the density of the seaplane. The word problem is as follows;

A four seater, single engine (160.0 hp), seaplane is floating on the Swan River with 80.30% of the plane's total volume being above the surface of the water and the rest below. The plane is full and at its maximum allowable total mass of 2200. pounds. The density of air is 1.225 kg/m3. It is also know that the standard reserve buoyancy of the plane in freshwater (at 4C) is 80.00%.

What is the density of the seaplane in kg/m3?