By Karen Brettell NEW YORK (Reuters) – The dollar fell to a one-week low against a basket of currencies on Wednesday after Federal Reserve Chairman Jerome Powell played down the prospect of a 75 basis point rate hike, even as he said the U.S. central bank will act aggressively to stamp out inflation. Powell said in a press conference following the Fed’s policy statement that the U.S. central bank is not actively considering a 75 basis point increase, but that additional 50 basis point jumps should be on the table for the next couple of meetings. It came after the Fed raised its benchmark overn…