A lost shipping container is found resting on the ocean floor and fully submerged. The container is 6.8 m long, 2.6 m wide and 2.3 m high. Salvage experts join a spherical balloon to the top of the container and inflate it with the air pumped down from the surface. If the balloon's radius is 1.4 m, the shipping container just starts to increase toward the surface. Determine the mass of the container? Avoid the mass of the balloon and the air within it. Do not avoid the buoyant force applied on the shipping container by the water. The density of sea-water is 1025 kg/m^3.t