The simple answer is no the mass of the cabin air will be less. An aircraft cabin is not pressurised to sea level, but normally to the equivalent of around 8000 ft. The cabin is held at a pre-defined differential pressure normally about 8 to 8.5 psi if I recall correctly.The only time the mass of air will be greater due to pressurisation is during maintenance,if the cabin is pressurised at sea level to carry out a leak check.
The cabin is not pressurised during take off and landing so the mass of the cabin air is dictated entirely by outside airpressure and I suppose by the volume taken up by pax and/or cargo.