The citation is ambiguous. It may mean:
54 Stat. 779 (Pub. Law 76-757)
AN ACT To establish the composition of the United States Navy, to authorize the construction of certain naval vessels, and for other purposes
You can view this U.S. Statutes at Large citation at these source(s):
54 Stat. 779
U.S. Statutes at Large
PDF - https://govtrackus.s3.amazonaws.com/legislink/pdf/stat/54/STATUTE-54-Pg779.pdf
also:
We also found 1 parallel citation:
54 Stat. 774 (Pub. Law 76-756)
AN ACT Authorizing the Secretary of the Interior to promulgate and to put into effect charges for electrical energy generated at Boulder Dam, providing for the application of revenues from said project, authorizing the operation of the Boulder Power Plant by the United States directly or through agents, and for other purposes
Link is to an internal page within a statute beginning on page 774.
You can view this U.S. Statutes at Large citation at these source(s):
54 Stat. 774
U.S. Statutes at Large
PDF - https://govtrackus.s3.amazonaws.com/legislink/pdf/stat/54/STATUTE-54-Pg774.pdf
also:
We also found 1 parallel citation:
