What is the fewest number of shuttles where the shuttle time is 6.55 seconds?
CREATE TABLE "calculations" (
  "level" real,
  "shuttles" real,
  "cumulative_shuttles" real,
  "speed_km_h" text,
  "shuttle_time_seconds" text,
  "total_level_time_s" text,
  "distance_m" real,
  "cumulative_distance_m" real,
  "cumulative_time_min_and_seconds" text
);
SELECT MIN("shuttles") FROM "calculations" WHERE "shuttle_time_seconds"='6.55';