The corporation may—

((1)) adopt a constitution, bylaws, and regulations;

((2)) adopt and alter a corporate seal;

((3)) establish and maintain offices and buildings to conduct its activities;

((4)) establish State and territorial organizations and local branches;

((5)) acquire, own, lease, encumber, and transfer property as necessary to carry out the purposes of the corporation, subject to its constitution and instructions of donors;

((6)) sue and be sued; and

((7)) do any other act necessary and proper to carry out the purposes of the corporation.