The volume of a vacuum manifold used to transfer gases is calibrated using Boyle's law. A 0.251 dm² flask at a pressure of 697 Torr is attached, and after system pump down, the manifold is at 10.4 mTorr. The stopcock between the manifold and flask is opened and the system reaches an equilibrium pressure of 287 Torr. Assuming isothermal conditions, what is the volume of the manifold?
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