CREATE TABLE table_37684 ("Name" TEXT, "Status" TEXT, "Population" FLOAT, "District" TEXT, "Former local authority" TEXT)

What district is St Martin's Without parish in with a population less than 75?
SELECT "District" FROM table_37684 WHERE "Population" < '75' AND "Name" = 'st martin''s without'
SELECT "District" FROM "table_37684" WHERE "Name" = 'st martin\'s without' AND "Population" < '75'